CN209994479U

CN209994479U - External camera device and system thereof

Info

Publication number: CN209994479U
Application number: CN201921189367.7U
Authority: CN
Inventors: 刘锡林; 杨玉峰; 袁文辉
Original assignee: Shanghai Sailian Information Technology Co Ltd
Current assignee: Shanghai Sailian Information Technology Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-01-24
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses an embodiment provides a method for utilizing external camera to carry out videoconference, and this method for utilizing external camera to carry out videoconference includes: connecting an external camera with an android television; audio and video signals are acquired through the external camera; compressing the obtained video signal into video signals of different code streams; transmitting the video signals compressed into different code streams to the android television; and the android television transmits the video signal of the lower code stream in the obtained different code streams to the other party of the video conference, and locally displays the video signal of the higher code stream. Furthermore, the utility model discloses embodiment still provides an utilize external camera to carry out video conference's equipment and system.

Description

External camera device and system thereof

Technical Field

The utility model relates to a surveillance video field, in particular to external camera device and application method and system thereof.

Background

The camera is also called a computer camera, a computer eye, an electronic eye and the like, is a video input device, is widely applied to aspects such as video conferences, telemedicine, real-time monitoring and the like, and common people can also talk and communicate with each other with images and sounds through the camera on a network. In addition, people can also use the method for various popular digital images, video and audio processing and the like. However, the professional videoconferencing systems currently available in the art are expensive and often are provided with a dedicated camera, screen and host. Some common android televisions or display screens are provided with built-in cameras, and video conferences can be carried out after video conference software is installed, but the built-in cameras are not cameras specially used for the video conferences, although the cost is lower than that of conference systems specially used for the video conferences, but the defects that the cameras not specially used for the video conferences are low in performance parameters, the pixels of shot video signals are poor, the positions of the cameras cannot be flexibly adjusted and the like are very annoying.

Disclosure of Invention

For this reason, there is a great need for an improved method and apparatus for video conferencing that can meet the high demands of users on video pixels and also save a lot of costs.

In this context, embodiments of the present invention desirably provide a method, apparatus and system for conducting a video conference using an external camera.

In a first aspect of the embodiments of the present invention, there is provided a method for performing a video conference by using an external camera, including: connecting an external camera with an android television; acquiring a video signal shot by the external camera; compressing the obtained video signal into video signals of different code streams; transmitting the video signals compressed into different code streams to the android television; and the android television transmits the video signal of the lower code stream in the obtained different code streams to the other party of the video conference, and locally displays the video signal of the higher code stream.

In a second aspect of the embodiments of the present invention, there is provided an apparatus for performing a video conference by using an external camera, including: functional part 1, support 2, base 3 make a video recording, its characterized in that: the camera shooting functional part 1 comprises a camera 4, a microphone group 5, an image sensor board 6 connected with the camera 4, a main processor 7, a memory 8 and an intelligent encoder 9; the intelligent encoder 9 is an intelligent encoder capable of outputting multiple paths of code streams with multiple video compression ratios simultaneously.

In an embodiment of the present invention, the base 3 includes a plurality of magnets 10 and a pan-tilt screw hole 11 capable of forming a closed magnetic field; the polarities of adjacent magnets in the plurality of magnets 10 are arranged in opposite directions.

In another embodiment of the present invention, a mechanical shutter rotary switch 12 is installed on the top end of the camera 4 for mechanically opening and closing the camera.

In still another embodiment of the present invention, the mechanical shutter rotation switch 12 is connected to the driving ring 13, and the rotation of the driving ring 13 controls the open or closed state of the mechanical shutter rotation switch 12.

In another embodiment of the present invention, the driving ring 13 is connected to the upper blade rotating shaft 14 and the lower blade rotating shaft 15 through two protruding shafts 17, and the protruding shafts 17 are driven by the rotation of the driving ring 13 to drive the upper blade rotating shaft 14 and the lower blade rotating shaft 15 to open and close; meanwhile, the drive ring is connected to a toggle switch 34 having an ON/OFF function through a lever 33; when the driving ring is rotated clockwise, the stop lever drives the toggle switch to be in an ON position, the upper blade and the lower blade are separated, and the equipment is in an open state; on the contrary, when the driving ring is rotated anticlockwise, the stop lever drives the toggle switch to be in the OFF position, the upper blade and the lower blade are closed at the same time, and the equipment is in the closed state.

In another embodiment of the present invention, a user-defined function button 16 is installed on the side of the camera 4 for defining the function of the key by the user.

In another embodiment of the present invention, the base 3 is connected to a USB cable.

In a third aspect of the embodiments of the present invention, there is provided a video conference system with an external camera, including: the external camera is connected with the android television; the external camera is used for acquiring video signals shot by the external camera and compressing the acquired video signals into video signals of different code streams; the android television is provided with a required video conference program; the external camera is also used for transmitting video signals compressed into different code streams to the android television; the android television is used for transmitting the video signal of the lower code stream in the obtained different code streams to the other party of the video conference and locally displaying the video signal of the higher code stream.

According to the method, the equipment and the system for carrying out the video conference by utilizing the external camera, the external camera is connected with the android television; the method comprises the steps that video signals shot by an external camera can be obtained, and then the obtained video signals are compressed into video signals of different code streams; transmitting the compressed video signals of different code streams to an android television; the android television transmits video signals containing lower code streams in the obtained video signals of different code streams to the other party of the video conference, and displays the video signals containing higher code streams on a local display screen; therefore, the utility model discloses an embodiment can be very big satisfy the video quality's in the user to the video conference requirement, also can practice thrift certain economic cost for the customer.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

fig. 1 is an overall structure diagram of the external camera device of the present invention;

fig. 2 is a structural diagram illustrating a base of the external camera device according to the present invention;

fig. 3 is a structural diagram showing the distribution of the magnets inside the base of the external camera device according to the present invention;

fig. 4 a-4 b are schematic diagrams illustrating an internal structure of the external camera according to the present invention;

fig. 5a-6b are structural diagrams of a mechanical rotary switch of an external camera according to the present invention;

FIGS. 7a-7b are ON/OFF state diagrams of the external camera according to the present invention;

fig. 8 is a schematic view of another embodiment of the external camera according to the present invention;

fig. 9 is a flowchart of a method for performing a video conference using an external camera according to an embodiment of the present invention;

fig. 10 is a block diagram of a system for conducting a video conference using an external camera according to an embodiment of the present invention.

Detailed Description

The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments. It should be understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and thereby implement the present invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, device, method, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.

According to the utility model discloses an embodiment provides a method, device and system for utilizing external camera to carry out video conference.

Moreover, any number of elements in the drawings are by way of example and not by way of limitation, and any nomenclature is used solely for differentiation and not by way of limitation.

The principles and spirit of the present invention are explained in detail below with reference to a number of representative embodiments of the invention.

Summary of The Invention

The utility model discloses the people discovers, because prior art when carrying out video conference through the camera, although can realize video conference's effect also, but, video conference among the prior art is most to utilize the built-in camera that computer or tall and erect TV self had, and the video information pixel of this kind of built-in camera transmission is very low, and the video quality of transmission is very poor. Although some video conferences also use an external camera, the angle of the camera cannot be flexibly adjusted by using the external camera, so that the requirement of a user on a professional video conference cannot be met.

In addition, a built-in camera usually does not have a mechanical blocking switch device, so a user can sometimes open the video communication software unintentionally to cause the camera to start up without knowing, so that privacy is leaked.

Generally, a professional video conference system needs to be capable of simultaneously acquiring video signals with multiple compression rates for adapting to different network conditions and for local high-definition display, and a traditional built-in camera or an external camera cannot simultaneously provide video compression signals with multiple code streams, so that during actual transmission, videos with multiple rates may need to be acquired for remote transmission in a software compression mode based on the network conditions. This can result in a delay or jerkiness of the video.

In addition, conventional cameras, which are built in or out, usually do not have a microphone array formed by multiple microphones. Microphone arrays are very important in professional video conferencing systems, because noise reduction can be achieved by the microphone arrays through sound coherence and the pick-up distance and directivity of the microphones are increased.

On the other hand, the traditional built-in or external camera does not have self-defined special keys, and a plurality of shortcut functions set by users can be realized through the self-defined special keys so as to facilitate the conference, for example, functions of muting by one key, taking a picture by one key, recording and videoing by one key and the like can be set.

In order to solve the problem that exists among the above-mentioned prior art, the utility model provides a be exclusively used in video conference's high price/performance ratio's external camera, through will the utility model discloses external camera is connected with conventional ann tall and erect TV and has both can realize the effect of the whole functions of professional video conference system. For example, a 4K high-definition multi-stream video signal can be obtained, a lens of a camera can be mechanically closed and opened, the position of the camera can be flexibly placed, remote sound pickup and noise reduction can be performed, and the like.

Therefore, the utility model discloses an embodiment can be very big satisfy the video quality's in the user to the video conference requirement, also can practice thrift certain economic cost for the customer.

Exemplary devices

Reference is made to fig. 1, which is a schematic structural diagram of an external camera provided in an embodiment of the present invention. As shown in fig. 1, the external camera includes a camera decoration ring 18, a lens 4, a camera field of view (FOV) shielding cover 19, a microphone array 5, a base 3, an aluminum alloy housing 20, a pitch angle rotation shaft 21, and a USB data line 35.

The camera decorating ring 18 is connected with the aluminum alloy shell 20 and fixed on the outer side of the lens 4 to protect the lens; the microphone arrays 5 are fixed on two sides of the aluminum alloy shell 20 in bilateral symmetry; the pitch angle rotating shaft 21 is connected with the base 3, so that a user can independently adjust the angle of the camera to meet the requirements of customers; the USB data line 35 is connected with the base 3 and used for connecting the camera with an android television.

Referring to fig. 2, the external camera device further includes a camera heat dissipation rear cover 22, a holder screw hole 11, and a silica gel anti-slip pad 23. The tripod head screw hole 11 is positioned in the middle of the base 3, so that the external camera can be better fixed at a position which is required to be fixed by a user; the silica gel anti-skid pad 23 is arranged on the base 3; the camera heat dissipation rear cover 22 is installed on the rear side of the external camera device, and can achieve a good heat dissipation effect on the camera device.

Referring to fig. 3, the base 3 further includes a magnet closed magnetic field 10, and the magnet closed magnetic field 10 is formed by adjacently arranging a plurality of magnets with opposite magnetic poles.

It should be noted that, this kind of closed magnetic field of magnetite that is constituteed by adjacent arrangement of magnet of opposite magnetic pole compares in the current technical scheme that can realize the monoblock magnet of effect of magnetism, and this technical scheme not only realizes simpler, and the adsorption affinity in closed magnetic field of magnetite is bigger moreover, can make the stability of this external camera better. The base of this magnetism is inhaled can adsorb on the iron-clad of android television or if the shell of android television is not the iron-clad can be used for placing this external camera on the shell through presetting an iron sheet adhesion.

Referring to fig. 4a, the external camera device further includes a main processor 7, a memory 8, a main board 24, and an encoder (not shown). The main processor 7, the memory 8 and the encoder are all mounted on the main board 24.

It should be noted that the encoder is a multi-path code stream encoder. At present, current equipment all uses ordinary encoder in the market, and the utility model discloses the use is multichannel code stream encoder, this kind of encoder not only can reduce cost, and can compress the video signal who acquires for the video signal who contains different code streams according to the difference in video signal output path is used for exporting to different users, specifically for the video signal who will contain lower code stream transmits the other end of video conference, the video signal who will contain higher code stream is used for showing in local video conference, and, the video signal who contains different code streams can be exported simultaneously and supplies video conference software to select suitable code stream to transmit based on the network situation.

For example, if the multi-path code stream intelligent encoder is a three-path code stream intelligent encoder, the maximum resolution of the main code stream is 4096 × 2160@30fps, the maximum resolution of the second code stream is 1920 × 1080@30fps, and the maximum resolution of the third code stream is 1024 × 768@30 fps. When different users use the external camera to carry out a video conference, the three-code-stream intelligent encoder firstly compresses the obtained video signal into the video signal containing the main code stream, the second code stream and the third code stream, then simultaneously transmits the video signal containing the main code stream to a first user side (a local user) for displaying on an android television connected with the external camera, transmits the video signal containing the second code stream to a second user side with better network condition for displaying, and transmits the video signal containing the third code stream to a third user side with poorer network condition for displaying. Since the transmission distance between the second and third users is long, if the obtained video signal is not compressed by the three-stream intelligent encoder, the video continuity of the video signal transmitted to the second or third user is greatly affected, for example, transmission delay and jamming may occur. And the transmission time of the video is greatly increased under the influence of network broadband resources, storage space and other factors, and because the first user side is a local user, the video is transmitted only through a directly connected USB (universal serial bus) line or a local wifi, and the transmission bandwidth is wide, the video signal containing a high code stream can be transmitted to the first user side for displaying and recording. Moreover, the video quality of the video signals with different code streams is different, the video quality of the video signal with higher code stream is higher, and conversely, the video quality of the video signal with lower code stream is lower.

Therefore, the three-code-stream intelligent encoder can improve the video quality of the video signal, can adaptively distribute signals with different video qualities to different video conference parties, and improves the continuity of the video signal.

The first user side is a user in the same side with the external camera, and the second user side and the third user side are users at the far end of the video conference.

Referring to fig. 4b, the external camera device further includes a heat conducting medium 26, a heat sink 27, and an image sensor board 28. The heat conducting medium 26 and the image sensor board 28 are fixedly connected to the rear end of the lens 4 of the external camera device, and the heat sink 27 is connected to the rear end of the heat conducting medium 26 to realize a heat dissipation effect on the external camera.

Referring to fig. 5a-6b, a mechanical shutter rotation switch device of the external camera device includes an upper blade 14, a lower blade 15, a driving ring 13, a shutter rear cover 29, a shutter front cover 30, a driving ring OFF shift 12, an upper blade rotating shaft 31, a driving ring protruding shaft 17, and a lower blade rotating shaft 32, wherein the upper blade 14 is integrated with the upper blade rotating shaft 31, and similarly, the lower blade 15 is integrated with the lower blade rotating shaft 32; and the upper blade and the lower blade are both arranged on the shutter rear cover 29; the driving ring convex shaft 17 is rotationally connected with the upper blade rotating shaft 31 and the lower blade rotating shaft 32; the driving ring protruding shaft 17 is fixed on the driving ring 13, and the rotation of the driving ring drives the rotation of the driving ring protruding shaft 17, thereby driving the separation/closure of the upper blades 14 and the lower blades 15.

For example, when the driving ring rotates clockwise, the clockwise rotation of the driving ring drives the clockwise rotation of the protruding shaft of the driving ring, so that the clockwise rotation of the protruding shaft of the driving ring drives the upper blade and the lower blade to rotate counterclockwise, and further the upper blade and the lower blade are separated, so that the device is in an open state, and at this time, the toggle switch is in an OFF state.

ON the contrary, when the driving ring rotates anticlockwise, the anticlockwise rotation of the driving ring drives the anticlockwise rotation of the driving ring convex shaft, so that the upper blade and the lower blade are driven to rotate clockwise through the anticlockwise rotation of the driving ring convex shaft, the upper blade and the lower blade are closed, equipment is in a closed state, and the toggle switch is in an ON state at the moment.

Meanwhile, the drive ring is connected to a toggle switch 34 having an ON/OFF function through a lever 33; when the driving ring is rotated clockwise, the stop lever drives the toggle switch to be in an ON position, the upper blade and the lower blade are separated, and the equipment is in an open state; on the contrary, when the driving ring is rotated anticlockwise, the stop lever drives the toggle switch to be in the OFF position, the upper blade and the lower blade are closed at the same time, and the equipment is in the closed state.

It should be noted that the toggle switch belongs to an electronic switch, and when the driving ring drives the upper and lower blades to be separated or closed, the electronic switch is driven to be in an OFF/ON state, and meanwhile, the device is in an ON/OFF state, so as to control the start or end of the video conference. For example, when a video conference is finished, the driving ring is rotated counterclockwise to drive the upper blade and the lower blade to be in a closed state, if the toggle switch is not provided, a black screen state can be presented on display screens of both parties performing the video conference, but the external camera equipment is still in an open state at the moment, and if the toggle switch is installed in the external camera equipment, when the video conference is finished, the driving ring is rotated counterclockwise to drive the upper blade and the lower blade to be closed, and simultaneously the driving ring drives the toggle switch through the stop lever to enable the toggle switch to be in an OFF state, so that the equipment can be closed while the lens is closed, and the video conference is finished.

In the above embodiment, when the driving ring is rotated clockwise, the shift lever drives the toggle switch to be in the ON position, and when the driving ring is rotated counterclockwise, the shift lever drives the toggle switch to be in the OFF position. The present invention is not limited to this, and the above-described rotation direction may be reversed.

Reference is made to fig. 7a-7b, where fig. 7a is the state when the device is open and fig. 7b is the state when the device is closed.

It can be seen that the switch of the device described in the present invention is not the existing switch of the general device in the field, but a mechanical shutter rotary switch, and this kind of switch can ensure that the lens of the camera is closed, avoiding the misoperation to lead to the inadvertent establishment of the remote video connection, so that the privacy of the user leaks. The mechanical shutter rotary switch is simple and convenient to operate, and whether the lens is closed or not is convenient to observe, so that the mechanical shutter rotary switch is safer and more reliable.

Referring to fig. 8, the external camera device further includes a smart button 16, wherein the smart button 16 is installed outside the external camera.

It should be noted that the smart button 16 can have different functions by setting at the client side by the user.

For example, in one embodiment, when the user sets the function of the smart button 16 as a photographing function, the user can take a photograph by pressing the function button 16 during a video conference; in another embodiment, if the user sets the function of the function button 16 as a scanning function, the user can align the file to be scanned with the camera and press the intelligent button 16 during the video conference, and at this time, the camera scans the file to be scanned by the user and stores the scanned file in the client; in another embodiment, if the user sets the function of the function button 16 as a video recording function, the user presses the intelligent button 16 during the model video conference, and at this time, the external camera device can record the picture captured by the camera, and store the recorded video to the client of the user, and then the user can use the video in the client. All these functions can be set by the user on the software and are therefore very convenient.

It should be noted that the smart button 16 of the present invention is not only the above listed functions, but also can realize different functions and effects through different functions set by the user.

Exemplary method

Referring to fig. 9, a flow chart of a method for video conferencing with an external camera according to an embodiment of the present invention is schematically shown, which may include the following steps:

and S900, connecting the external camera with an android television.

As an example, the embodiment of the present invention provides an external camera connected to an android television, and the external camera device can be inserted into a USB jack of the android television through a USB data line provided on the external camera device, so that the external camera device is connected to the android television. Besides USB connection, the external camera can be connected with an android television in a wireless mode such as wifi or Bluetooth.

And S910, obtaining audio and video signals through the external camera.

The camera head converts an optical signal into a digital signal through a lens and an image sensor thereof, and picks up sound through a built-in microphone array, and then is subjected to filtering and noise reduction processing.

And S920, compressing the acquired video signals into video signals of different code streams.

As an example, in the embodiment of the present invention, the multi-path code stream intelligent encoder in the external camera compresses the acquired video signal into video signals of different code streams;

and S930, transmitting the video signals compressed into different code streams to the android television.

The multi-path code stream intelligent encoder simultaneously transmits the compressed multiple code streams to the android television, and is used for compressing the obtained video signals into video signals containing different code streams by video conference software installed on the android television according to different video signal output paths so as to output the video signals to different users.

And S940, the android television transmits the video signal of the lower code stream in the obtained different code streams to the other party of the video conference, and locally displays the video signal of the higher code stream.

As an example, the embodiment of the present invention provides a video signal compressed by the above-mentioned multi-path code stream intelligent encoder according to the difference of the transmission users, and transmits the compressed video signal containing different code streams to different clients simultaneously, and transmits the video signal containing lower code stream to the other party of the video conference, and displays the video signal containing higher code stream locally.

Exemplary System

Referring to fig. 10, the present invention further provides a video conference system using the external camera 102 of the present invention, the system includes: the utility model discloses an external camera shooting, 102 and with the tall and erect TV 101 of ann that external camera is connected, its characterized in that:

the external camera 102 is connected with the android television 101;

as an example, the embodiment of the present invention provides an external camera connected to an android tv, and the external camera device 102 can be connected to the android tv 101 by inserting the USB data line of the external camera device 102 into the USB jack of the android tv 101. Besides the USB connection, the external camera 102 can be connected with the android television 101 in a wireless mode such as wifi or Bluetooth.

The external camera 102 is configured to obtain a video signal captured by the external camera, and compress the obtained video signal into video signals of different code streams;

the android television 101 is provided with a required video conference program;

as an example, the utility model discloses use when the user in the embodiment the utility model discloses before carrying out the video conference, need install in advance on the android television who uses and carry out the fixed video conference APP that the video conference needs.

The external camera 102 is further configured to transmit video signals compressed into different code streams to the android television 101;

as an example, the multi-path code stream intelligent encoder simultaneously transmits the compressed multiple code streams to the android television 101, and is used for compressing, by video conference software installed on the android television 101, the obtained video signal into a video signal containing different code streams according to different video signal output paths so as to output the video signal to different users.

The android television 101 is configured to transmit a video signal of a lower code stream of the obtained different code streams to another party of the video conference, and locally display the obtained video signal of a higher code stream.

Further, while the operations of the method of the present invention are depicted in the drawings in a particular order, this does not require or imply that the operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.

While the spirit and principles of the invention have been described with reference to several particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in such aspects may not be combined to benefit. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. The utility model provides an external camera device, includes camera function portion (1), support (2), base (3), its characterized in that:

the camera shooting functional part (1) comprises a camera (4), a microphone group (5), an image sensor board (6) connected with the camera (4), a main processor (7), an internal memory (8) and an intelligent encoder (9);

the intelligent encoder (9) is an intelligent encoder capable of outputting multi-path code streams with various video compression ratios simultaneously.

2. The external camera device according to claim 1, wherein:

the base (3) comprises a plurality of magnets (10) capable of forming a closed magnetic field and a tripod head screw hole (11);

the polarities of adjacent magnets in the plurality of magnets (10) are arranged in opposite directions.

3. The external camera device according to claim 1, wherein:

and a mechanical shutter rotary switch (12) is installed at the top end of the camera (4) and used for opening and closing the camera in a mechanical mode.

4. The external camera device according to claim 3, wherein:

the mechanical shutter rotary switch (12) is connected with the driving ring (13), and the opening or closing state of the mechanical shutter rotary switch (12) is controlled by the rotation of the driving ring (13).

5. The external camera device according to claim 4, wherein:

the driving ring (13) is respectively connected with the upper blade rotating shaft (14) and the lower blade rotating shaft (15) through two convex shafts (17), and the convex shafts (17) are driven by the rotation of the driving ring (13) to drive the upper blade rotating shaft (14) and the lower blade rotating shaft (15) to open and close;

the driving ring is connected with a toggle switch (34) with an on/off function through a gear lever (33);

when the driving ring is rotated, the gear lever drives the toggle switch to be in an on/off position, the upper blade and the lower blade are separated/closed at the same time, and the equipment is in an on/off state.

6. The external camera device according to claim 1, wherein:

the side surface of the camera (4) is provided with a self-defined function button (16) which is used for defining the function of the key by a user.

7. The external camera device according to claim 1, wherein:

the base (3) is connected with a USB connecting wire (35).

8. A video conferencing system having the external camera of any of claims 1-7, the system comprising: the external camera of any of claims 1-7 and an android television connected to the external camera, wherein:

the external camera is connected with the android television;

the external camera is used for acquiring video signals shot by the external camera and compressing the acquired video signals into video signals of different code streams;

the android television is provided with a required video conference program;

the external camera is also used for transmitting video signals compressed into different code streams to the android television;

the android television is used for transmitting the video signal of the lower code stream in the obtained different code streams to the other party of the video conference and locally displaying the video signal of the higher code stream.